We have recently imported our DB from SendinBlue to Klavyio.
While sending our first newsletter, we got around 30 postmaster emails to notice undelivered emails + 400 hard bounce. That is alot, we didn’t have that before in SendinBlue.
I went into our DB to remove these, but the strange thing is that these 30 emails address (which generated postmaster) are UNKNOWN and IMPOSSIBLE to find in our DB.
I therefore DONT UNDERSTAND how this is possible?
Can somebody help me?
Best answer by cassy.leeView original